OTHER ANSWERS

Sorry to hear that you were having problems with the WordPress site. It took a little while to figure out what was happening, but the problem has to do with something that was affected in your wp-includes folder. Since you are currently using WordPress 3.5.1, I pulled up an original version of the includes folder from Wordpress and replaced your current one. When I did this, your website came back up with no problems. I'm not sure what you have loaded, but I strongly recommend that you update your WordPress version as soon as possible.

The updates are often done in order to patch up Security issues - which may be part of the reason your site stopped working. It should be up now, sorry again for the issues that you were having!